Influence of Backfill Compaction on Mechanical Characteristics of High-Density Polyethylene Double-Wall Corrugated Pipelines

Figure 9

Comparison of measurements and calculation of pipe strains in the well-compacted backfill: (a) liner circumferential strain; (b) valley circumferential strain; (c) crest circumferential strain; (d) valley axial strain.

(a)

(b)

(c)

(d)